Paper-bag machine.



11. SMITHWIOK.

. PAPER BAG MACHINE. APPLICATION FILED DBO.15, 1910,

Patehted July 11, 1911.-

4 SHEETS-SHEET 1.

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v Warng'.

H. SMITHWICK.

PAPER BAG MACHINE. APPLIOATIONI'ILED DEC. 15, 1910.

Patented Jul 11, 1911.

4 SHEETS-SHEET 20/99763565 /27 denibr H. SMITHWIGKi PAPER BAG MACHINE.

APPLICATION FILED DEG.15, 1910.

Patented July 11,1-911.

4 SHEETS-SHEET 3.

H. SMITHWICK.

PAPER BAG MACHINE.

APPLICATION FILED DEO.15, 1910. 997,33.6 Patented July 11, 1911.

4 sums-sum 4.

' although the bag of said Widmer, patent-can AROLD sMrTHwIcK,

UNITED STATES.

- Specification of Letters Patent.

r OFFICE.

F RUMFORDQMA INE, ASSIGNOR' T0 CONTINENTAL COMPANY, A CORPORATION OF MAINE.

PAPER BAG g i. iAI- 'ERJBA G iuscrrrivn.

Patented July 11, 1911.

' AppHcation filed December 15, 1910. Serial No. 597,462.

- To'all whom'itmay c0nccrn:

- Be itknownthatl, HAROLD SMITHWIOK, a' citizen of theUnited States, and a resident ofRulnfordfin the county of Oxford and State [of Ill 1211118, have invented certain new fill Improvements in Paper-Bag Majof' which the following is a speci- .";.T:his invention relates to paper bag machines oft-hat class adapted to make paper bags from a continuous paper tube having inwardly folded tucks in opposite sides thereof, and is particularly adapted 'for producing the typeof paper bag illustrated and claimed in U. S. Patent Number 904167 granted to Howard Gr. \Vidmer, Nov. 17,

v The objectof the present invention is to furnish a machine of the class specified, simple in construction and rapid and accurate in action.

The preferred embodiment of my improvements is illustrated in the drawings accompanying this specification wherein Figurel is a plan view of a paper bag machine comprising my improvements. Fig. 2 is a side sectional elevation on line 11 ofFig. 1. Fig. 3 is an end view of the diagonal creasing means. Fig. 4. is a plan view partially in section of a part of what is shown in Fig. 3. Fig. 5 is a sectional elevation of the same. Fig. 6 is a front ele-' vation of a part of the transverse creasing means. F ig. 7 is a bottom plan view thereof and Fig. 8 is an end view of sa1d transverse creasing means. .Flg. 91s a plan view of a paper bag as made in my improved machine.

Figs. 1 and 2 are drawn to a much smaller scale than that of the other figures.

Before theinvention of the paper bag'of lVidmer, Patent 904167, it was considered necessary in order to producesquare bot tomed paper bags, to provide them with the s'ocalled diamond folded bottom. But by side tucked flat bag may be made without appreciable extra expense, to have the highly,,.desirable easy opening, square bottom. attributes of the more expensive and complicated diamond folded bag. However.

be produced: on comparatively simple machinery and athigh speeds, the eff clent production 'of the peculiar creases to enable and 7 cause that 'bag'to-open as described, isnot.

means of the .Vidmer invention the ordinary an obvious or simple accomplishment. Those peculiar creases comprise two diagonal symmetrically disposed creases .2, 2 across the bottom corners of the bag 4 and one transverse crease 3- thereacross adjacent to the divergent ends of said diagonal creases, all as shown in Fig. 9. The particular features of the'present invention reside in the novel and ingenious means provided for eiliciently forming said creases in the several plies of the bagafter it'has been folded and pasted to close the bottom 1 thereof.

Referring now more particularly to Figs.

'1 and 2 of the drawings a continuous paper tube 6 having inwardly folded tucks 7, 7 in the opposite sides thereof is led over guide plate 8 in coaction with the end of which plate striker 9 severs said tube into blanks as 10 of predetermined length. Prior to the severing. of blanks-1O from tube 6 the lead- 1ng end of said blank has been fed through guide 11 and into the grip of pasting plate 12 and bar 13. .As soon as the blank is severed tucker blade 14 descends and delivers '-the folded and pasted leading end of the blank to the grip of rolls 15, 16 which squeeze and seal the bottom and forward the bag over-guide 17 into the grip of rolls 16, 18 and thence between guides 19, 19 to the diagonal creasing mechanism 20, 21.

scribed is of well known character elementary description and illustration thereof -is deemed sullicient for the present purpose.

From diagonal creasing mechanism 20, 21 the bag is forwarded over guide 26 to the transverse creasing mechanism 27, 28 and thence discharged from the machine- Before proceeding to the detail description of my improved creasing mechanism, I

will describe the means for driving in proper direction and timing the several parts of my" machine. The several shafts thereof are rev;

olubly mounted in suitable bearings in the usual side frames 50, 51. Power maybe supplied to pulley 29 on shaft 30 of roll 1? from any suitable source of power not shown. Gear 31 on shaft 30 drives equal gear 32 on shaft 22 and gear 32 drives equal gear 33 on shaft 28. lreasing mechanism 20, 21 is driven from main shaft 30 by chain 34tconnecting sprocket 35 on shaft 30 with equal sprocket 36 on shaft 38'. Gear 39 on shaft 28 drives equal gear 450 on shaft 37. Creasing' mechanism 27, 28 is actuated from shaft 38 as follows: Gear ti on shaft 38 drives equal gear a2 on shaft as through inte-rmedi' ate gear 4:4: on stud l5 outstanding from side frame 50. Gear 4E6 on shaft 43 drives g ilial 'ear 4;? on shaft as. Creasiiw mechanism.

shafts 37, 48 are preferably mounted in vertically slidable boxes as 4:9, 49 and 59, 51) respectively spring urged to their work as diagrammatically indicated at 52, for instance, all as well. known in the art.. The circumferential positions of rolls 20, 21, 27. 28 of the creasing mechanisms in F 1 and 2 are such as to most clearly show their de tails of construction and are not timed with the shown position of bag blank 10 in process of making. Rolls 20, 21 should be set back circumferentially about 92 degrees and rolls 27, 28 should be set forward 1111} degrees to cause them to be properly timed with the bottom formingmechanism.

Directing attention now more particularly to the creasing mechanisms it will be un-- derstood that for the ultimate eiliciency of creases :2, 2 and 3 said creases must be orig-5 nally formed with such pronounced charac-' teristics as to be able to maintain those characteristics in a large measure curing subsequent handling, bundling, packaging under pressure, storing and shipping and until they are needed for actual use. lThis obviously requires that said creases be sharply defined and of substantial depth. My improved mechanism is particularly adapted for accomplishing these results positively and efficiently. 4

Referring particularly to Figs. 3 and 5 I will describe in detail the construction of the diagonal creasing mechanism. Roll 20,.fixed to shaft 37, has the usual circumferential surfaces 54, 5 l. for coaction with similar surfaces as 55' on roll 21 for feeding the bag therebetween. The circumferential continuity of surfaces 54, 54 is broken by pockets 56, 56 in which are housed diagonal creasers 57, 58. Said creasers are mounted to move toward and from each other in substantial parallelism with axial shaft 37 and coacting creasers as 60 of roll 21 are similarly mounted. For permitting said creasers to move toward and from each other as described I preferably mount them pivotally on shafts as ('32 of creaser 538 within roll 20, as remote as may be from their creasing edges 63, O l of said ycreaser 58. To permit the symmetrical disposal of said'cre sers relative to their roll shafts as for instance creaser 58 to roll shaft 3?. l provide an annular portion through which said shaft 3? freely passes and. said creaser terminates in hub 66 on shaft 62 between cars 67, 67 of roll 20. Outward movement of creaser 58 is adjustably limited by means of stop screw 68 threaded into the hub of roll 20.;and having head 69 thereof overhanging said creaser for engagement therewith. Creascr 57 is similarly limited in outwardmovement by stop screw 70. Said creasers 57, 58 are urged away from each other and against their respective stop screws by means of spring 71 between plungeirs 1'2, 73 in roll 20 and hearing against the inner faces of creasers 57, 58 respectively. Stop screws as (38, T0 are also efficient for adjusting said creasers in and out. in substantial parallelism with axis 37, relative to their respective opposing creasers on the other roll. When the bag pa es into engagement with creasers 58 and (30. blade so of creaser 50 forces the paper between olades 63, 64, drawing the paper from both. directions in so doing; at the same time (:2 1 13?? 57 and its opposite creaser in roll 2t, not shown, are operating similarly at the opposite side of said bag. Outer portions a, a (Fig. 9) being free will yield inwardly under this creasing operation but middle portion 7) being continuous and in the grip of opposing sets of creasers, cannot yield and if said opposing sets of creasers were fixed relative to each other said middle portion 5 must of necessity be broken and the bag dcstroyed. However said opposing sets of creasers being yieldahly mounted as dcscribed, they move inwardly toward each other at each creasing operation, more or less, as required by the thickness of the ha and the depth of crease being made. It will thus be seen that the described yieldability of said diagonal creasers is required for successfully' forming the requisite creases across the corners of the bottom of the bag and for forming those creases of the requisite depth for their ultimate etliciency.

The several creasing blades {IS-63, or are adjusted relative to their adjacent mates as follows. Referring particularly to creaser 58, blade 6% thereof is fixedthereto by countersunk screws '74, 74:. Screws 75, T5

threaded into the head of creaser 58 have spherically faced collars 76, 76 thereof in engagement with spherically faced seats 77,. T7 of the under side (Fig. st) of blades 63 whereby either or both ends of said blade may be moved toward or from liilade (it. Screws T8, 78 also threaded into the head of crcaser '58 and passing through blades G3. (34- have collars T9, 79 engaging the upper face (Fig. 4.) of blade ()3 for holding blade securely in its adjusted position lid against collars 6, 76 of screws 75, 75, relative to blade 64. It willbe understood that. the blades of creas'er 57 are Similarly ad-f justed and fixed as 'just'described in connec-l tionlwithoreaser58.,

' Referring now particularly to Fig. 3 blade 80 of creaser 60. is securedin position on said creaser by collar head screws as. 81 passing through slotsas 82 in said blade and threaded into the head of said creaser. Said slots as 82 are provided to allovvof vertical adjustment of said blade 80 relative to opposing'jblades 63, 64' of creaser 58.

Said vertical adjustment may be made ateither' or both ends of blades 80 by means of pushscrews 83, 83 threaded into the head of c'r a erco underblade 80 and bearing It will thus be seen that ,creaser' blades 63,64 and 80 are universally "adjustable in their relations to each other by the means justdescribed. The' necessity,

for such adj ustability is first, to allow for he various thicknesses of paper from which the bags may be made and also to allow for the variable stiffness of said paper. Second,

to be able to crease the bag lightly upwardly from thebottom where there are eight thicknesses of paper and then to make said crease deeper at its upperend where there are only four thicknesses. A further necessity for depth and'definit-ion at the upper ends of the diagonal creases is to provide an eflicient dam against mate-rial poured into the bag from getting into the corners and thus preventing the bot-tom from opening properly.

Another requisite attribute of both the diagonal and transverse creases is hardness to enable said creases to maintain their in tegrity until the bag is put into actual use. Thisat-tribute is partially attained by the efiicient relative setting of the opposing creasers but I have found that a much higher efiiciency'm'ay be added bysetting' 16, 18 are-therefore adjustably mounted so s that they mav be, arran ed-to hold the bag suiiiciently tight to make the creases ashard ;as possible withoutbreaking the paper. -The requisite retardation for the transverse creasing is attained by gripping. the bagbe tween faces as 54, .55 of rolls 20, 21' respe'o tively while said transverse creasing being done.

Referring now particularly to Figs. 6, 7 and8 the transverse creasers are mounted and adjusted as follows. Upper roll 27 is provided with three creasing members.

First,.c'reasing edge 85 fixed in said r011 and having its face coincident with periphery 270 of the roll. Said edge 85 might be integral with the roll butfor' convenience a 3 and strength it is made of steel and held in 7 0 place by screws 84. Creasing blades 8 6"and 8,7 are adjustably mounted inroll 27. Said blades are independent-lymovable radially said roll and blade 87 is also 'ln'ovable ltoward and from blade 86. Radial movement of'blade 86 may be had by means of wedge 88thereunder moved'by screw 89 threaded into the end of roll 27 and having collars as 90 in'engagement with yoke head 91 of said wedge. Blade'87 may be moved radially independent of blade 86 by means of wedge 92 having yoke head 93 in engagement with collars 94 of screw 95 threaded into the end of roll 27. For adjusting blade 87 toward and from blade 86wedge 96 8'5. therebetween is moved lengthwise said blades by means of screw 97'threaded into the end of roll 27and having yoke head 98 thereof in engagement with collars 99 of said screw. Said wedge 96'is slotted at 101, 101 for the passage of screws'lOO, for binding blades 86, 87 and wedge 96"tightly against face 102 of roll 27 Creasingblades 103, 104 of roll 28 are mounted and adjusted inevery way similar to the mounting and adjusting means ofblades 86, 87 of roll 27 just. described, except that blades 103, 104 are moved radially in unison by the "one wedge 105 instead of independently by :two

,beyond the periphery 106 or roll 28. Edge 85 and blade 87 are highly useful in the creasingoperation as they hold the paper upto be operated upon by creasers 103, 104. 110 Edge 85 is also useful in coaction with tension surfaces 54, 55 of rolls 20,21 respectively to produce a hard transverse crease in the bag. a I 1 The operation of my improved machine will be readily understood 'from the foregoing description and I will now direct attention only to some peculiar features thereof.

, Suitable tucked paper tubing being supplied to the machine and operated upon asdescribed to form a blank and then to. close the leading end of said blank to form the bag'botto'm, said bottom end is'delivered to the bite of diagonal creasers 57, 58 above and 'coaeting creasers as 60 below. The pressing of the paper bet-ween the'creaser blades as 63, 64 by blade- 80'draws the bag crosswise thereof and-as the gbag isunyield'-- able, oppositei creasers' as' 57," 58 -'yield-'in- Wardly on their pivots thus relieving an hard and &

otherwise breaking strain on the paper. Also there is a simultaneous drawing forward, in the direction of its travel, of the bag, and as said bag is still in the grip of rolls 16, 1.8 it is retarded in that forward movement which results in the diagonal creasesbeing formed in the bag under ten sion, whereby said creases are made hard and definitive and. able to withstand handling and packaging without being obliter-- ated. The diagonally creased. bag now passes onwardly into the grip of the transverse creasers in rolls 27, 28. 'The pressing of the paper between the several blades of said creasers draws the bag forwardly, in the direction of its travel, and as said bag is still in the grip of surfaces 5d, of rolls 20, 21 respectively said bag is retarded in that forward movement, which results in the formation of the transverse creases 'under tension whereby said creases are made definitive and of commercial utility.

I claim:

1. A paper bag machine including in combination, means for forming diagonal creases across the corners or". the bagbottom, comprising opposite rotary members each having pivotally mounted creasing blades therein yieldable lengthwise said rotary members.

2. A paper bag machine including in combination, means for forming diagonal creases across the corners of the bag bottom, comprising op osite rotary members each having pivota ly mounted creasing blades therein yicldable lengthwise said rotary members and means for applying retarding tension to the bag during the operation of said crcasers.

3. A paper bag machine including in combination, a member having therein two creasing members, each creasing member comprising a plurality of creasing blades relatively adjustable both in parallelism and in angular relation to each other. i

41-. A paper bag machine including in combination, a member havingtherein two creasing members relatively yieldably .mounted, each creasing member comprising a plurality of creasing blades relatively adjustable both in parallelism and in angular relation to each other.

5. A paper bag machine including in combination, a rotary member having two creasing members pivotally mounted therein for movement toward and from each other, on axes independent of each other and independent of the axisof the rotary member.

6. A paper bag machine including in combination, a rotary member having p1votally mounted therein for movement to and from each other, on axes independent of each other and independent of the axis of the revoluble member two creasing members, each creasing member comprising a plurality of creasing blades relatively adjustable and means for adjusting said creasing members relatively.

7. A paper bag machine including in combination, a rotary member having pivotally mounted therein for movement to and from each other, two creasing members, each creasing member comprising a plurality of creasing blades relatively adjustable both in parallelism and in angular relation to eachother and means for adjusting said creasing members relatively.

8. A paper bag machine including in combination, two oppositely disposed rotary members each having pivotally mounted therein on axes independent of each other and independent of the axis of its rotary member two creasing members and each creasing member comprising a plurality of creasing blades relatively adjustable.

9. A paper bag machine including in combination, two'oppositely disposed rotary members each having pivotally mounted therein two creasing members, each creasing member comprising a plurality of creasing blades relatively adjustable both in paral lelism and in angular relation to each other.

10. A paper bag machine including in combination, means for forming diagonal creases across the corners of the bag bot-tom, comprising opposite rotary members each having creasers therein yieldable lengthwise said rotary members, means for applying retarding tension to the bag during the operation of said creasers, means for forming a transverse crease across the bag, coin- :orisin o osite rotar members each having creasers therein and means for applying retarding tensionto the bag during theopeiy ation of said creasers.

11. A paper bag machine including in combination, means for severing a blank from a continuous tucked paper tube, means for folding over and pasting down the leading end of said blank to close the bottom of the bag, means for forming diagonal creases across the corners of the bag bottom, comprising opposite rotary members each having creasers therein yicldable lengthwise saidv rotary members and means for applying retarding tension to the bag during the operation of said creasers.

Signed this 10th day of December, 1910, at New. York, N. Y. before two subscribin witnesses.

HAROLD SMITHVVICK.

Witnesses THno. HAWLEY, Max HooHFnLoT. 

